مقایسه بتن حاوی پودر باریت و گرافیت در برابر پرتو گاما و کد MCNP

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مهندسی عمران، دانشکده فنی، دانشگاه گیلان، رشت ایران

2 گروه عمران، گرایش سازه،دانشکده فنی،دانشگاه گیلان،رشت،ایران

چکیده

با توجه به توسعه‌ی فناوری هسته‌ای در دنیا و استفاده از این تکنولوژی در صنعت و مراکز درمانی، توجه و سرمایه گذاری کشورها در این حوزه بیشتر شده است. در این پژوهش، بتن‌های مقاوم در برابر پرتو در دو سری ساخته شده‌اند. در سری اول شامل پودر باریت با درصدهای 10، 25، 50، 75و 100 درصد جایگزین ماسه و در سری دوم پودر باریت با درصدهای ذکر شده به همراه 10درصد پودرگرافیت تهیه شد. در این پژوهش، عیار سیمان kg/m3 400 و نسبت آب به سیمان 0.4 و به بتن های حاوی مواد افزودنی نیز 10% میکروسیلیس نیز اضافه شده است. خواص مکانیکی این بتن ها مانند مقاومت فشاری و مقاومت کششی تعیین گردید. همچنین اثر آن‌ها به عنوان حفاظی در برابر پرتو گاما با استفاده از چشمه CS-137 مورد آزمایش تجربی قرار گرفتند و سپس به وسیله کد شبیه سازی MCNP به روش مونت کارلو مورد مطالعه و مقایسه قرار داده شده است. نتایج حاکی از آن بود که نمونه‌ی حاوی 10% پودر باریت به همراه 10% پودر گرافیت می‌تواند مقدار بهینه جهت حفاظت در برابر اشعه گاما باشد. همچنین مقایسه نتایج آزمایش تجربی با کد MCNP توافق نسبتاً خوبی را نشان داد و روند افزایش و کاهش آن تقریباً یکسان بوده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Comparison of Concrete Containing Barite and Graphite Powder against Gamma-ray and MCNP Code

نویسندگان [English]

  • Seyed Hosein Ghasemzadeh Mosavinejad 1
  • samira kazemi rad 2
1 Civil Eng. Dept, college of eng. University of Guilan, Rasht, Iran
2 Civil Engineering,Technical College,University of Guilan,rasht,iran
چکیده [English]

Concerning the development of nuclear technology in the world and the use of this technology in the industry and medical centers, the attention of countries to this topic and investment in this area has greatly increased. In this research, concrete was made in two series. In the first series, barite powder was replaced with 10, 25, 50, 75 and 100 percent as sand replacement, and in the second series, barite powder with the percentages as mentioned earlier and 10 percent graphite powder was prepared. In the present study, the amount of cement 400 kg/m3 and water to cement ratio of 0.4 and additives have been added to the concrete containing 10% micro-silica. The mechanical properties of these concrete were determined such as compressive strength and tensile strength. Their effect was also tested as a protection against gamma radiation using the CS-137 source and then examined by comparing the MCNP simulation code by Monte Carlo method. The results indicated that a sample containing 10% barite powder plus 10% graphite powder could be an optimal amount of protection against gamma rays. Also, the comparison of experimental results with the MCNP code showed a fairly good agreement, and the trend of its increasing and decreasing was almost the same.

کلیدواژه‌ها [English]

  • Barite powder
  • Graphite Powder
  • gamma ray
  • MCNP code
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